Apparatus for administering anesthetics.



W L SMITH APPARATUS FOR ADMINISTBRING ANESTHETIOS.

APPLICATION HLBD JAN. 20, ,1913.

Patented Mar. 31, 1914.

N an WITNESSES zmw w M UNITED STATES PATENT OFFTQE WESLEY LINFORD SMITH, 0F PITTSBURGH, PENNSYLVANIA.

APPARATUS FOR ADMINISTERING ANESTHETICS.

Application filed January 20, 1913.

To all whom it may concern Be it known that I, WESLEY LINFOBD SMITH, a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful 1mprovement in Apparatus for Admlnistering Anesthetics, of which the following is a specification.

This invention relates to apparatus for administering gaseous anesthetics such as nitrous oxid or the like.

The object of the invention is to provide improved apparatus of the character described which is provided with passages for conducting air and gaseous anesthetics to the mantle or hood and valve mechanism for controlling said passages so that either air alone or gas alone may be supplied.

In the drawings, Figure 1 is a view partly in side elevation and partly in section of apparatus embodying the invention; Fig. 2 is a cross section on the line 2-2, Fig. 1; and Fig. 3 is a detail view corresponding to Fig. 1 and showing the valve in another position.

The apparatus shown in the drawings comprises a main body member 1, preferably formed of cast metal such as brass, aluminum or steel and at one end provided with a transverse aperture or socket 3 extending from top to bottom and arranged to receive the neck 4 of a tank or receptacle 5 containing the gaseous anesthetic. The body member and neck are clamped in fixed relation to each other by a set screw 6 threaded through the end of said member and bearing at its inner end against one side of the neck 4.

The opposite end portion of the body member is cored out, as at 7, to provide a passage for conducting the gaseous anesthetic or air to the conduit 8, which may be a flexible tube removably attached to the end of the body member, and is provided at its opposite end with a suitable hood or mantle 9 to be placed over the nose and mouth of the patient and from which the gas is inhaled.

Intermediate its ends the body member 1 is provided with a transverse vertical bore 10 having a slight downward taper to receive a tapered valve plug 11 hereinafter referred to. Bore 10 on one side connects with the cored out passage 7, and on the other side, through an oval aperture 12, connects with an air passage 13 extending clear Specification of Letters Patent.

Patented Mar. 31, 1914.

Serial No. 743,106.

through from side to side of the body and open at both ends to the atmosphere.

Body member 1 is also provided with a longitudinal passage 14 connecting at one end with a discharge port 15 in the side of the neck 4, and at its other end with a small tube or pipe 16 threaded into the body member and which projects outwardly into the bore 10, which extends through a boss or enlargement 1'? on the bottom of the body member. Pipe 16 is provided wit-h an extension 18 in the form of a rubber tube which depends therefrom and is contained within a suitable gas receptacle 19, which in the present instance comprises a flexible rubber bag secured at one end to the boss or enlargement 17.

The flow of gas from the tank to the gas container 19 is regulated by a suitable valve in the neck 4 operated by a handle 20.

Valve plug 11 is provided at its upper end with a suitable operating handle 21, and in its outer surface has an annular V-shaped groove or depression 22 into which projects the pointed end 23 of a set screw 24 threaded through the body member. Set screw 24 holds the valve tightly to its seat and also prevents accidental removal or loss thereof. The upper portion of the valve plug is solid but is provided with one or more transverse ports or passages 25 extending therethrough and located in the same horizontal plane with the air passage 13 through the casing. The lower portion of the valve plug is hollow to provide a cavity 26, which communicates through the bottom of the valve with the chamber inside the gas receptacle 19 and, in one position of the valve, also communicates, through a port 27 in the side wall of the plug, with the cored out passage 7 before referred to.

Between the valve 11 and the delivery end of the body member 1, the latter is provided with a transverse passage 28 communicating with the cored out passage 7 Said passage 28 is threaded to receive a suitable inhalation and exhalation valve of any preferred type, for example that shown in patent No. 1,045,140, granted November 6, 1912 to A. E. Guedel. No further description thereof is therefore necessary.

The apparatus described operates as follows: The handle 20 is first manipulated to open communication between the tank 5 and gas receptacle 19 through the port 15, passage 14 and tube 16. The mantle or hood 9 is then placed over the nose and mouth of the patient and valve 11 is rotated by means of its handle 21 to the position shown in Fig. 1, thereby opening communication from the gas receptacle 19, through cavity 26, port 27, and passage 7 to the mantle. At this time both ends of port 25 are opposite blank portions of the inner wall of the bore 10 and the air supply through valve 11 is fully cut off, as shown in Fig. 2. The valve 29 is adjusted to permit the proper quantity of air to be inhaled with the gas and at the same time takes care of the gas and air exhaled by the patient and flowing backwardly through the conduit 8. A continuous supply of anesthetic willbe inhaled by the patient as long as the valve 11 occupies the position described. Whenever it is desired to cut off the supply of anesthetic, valve 11 is rotated by its operating handle to the position shown in Fig. 3. In this position, port 27 is opposite a blank portion ofthe inner wall of the bore 10 and communication from the gas receptacle to the mantle or hood 9 is entirely cut off. At the same time the port 25 opens up communication between the transverse air passage 13 and the cored out passage 7 thus permitting a free supply of air to flow through the apparatus and quickly reviving the patient. The port 25 and the passage 13 are preferably made as large as possible so as not to restrict the free flow of air as described, and preferably port 25 is oval in cross section as illustrated in Fig. 8 for this purpose.

The valve mechanism described is simple and can be readily manufactured. The ports and passages are so arranged that the completed device is pleasing in appearance and can be readily cleaned. It also permits the physician or attendant to readily control the quantity of gas or air inhaled by the patient.

WVhat I claim is:

1. Apparatus for administering gaseous anesthetics, comprising a single integral body member provided with a transverse bore and arranged at one end of said bore to receive a gas receptacle, said member having a longitudinal passage communicating at one end with said bore and a transverse passage leading from said bore to the atmosphere, said body member being arranged at the other end of said longitudinal passage for the attachment of a tube leading to a mantle or hood, said body member at its other end being arranged for attachment to an anesthetic reservoir and having a passage leading therefrom to said gas receptacle, and a valve in said bore arranged to control both the supply of anesthetic from said receptacle and the supply of air through said transverse passage to the longitudinal passage in said body member for transmission thereof to the mantle or hood.

2. Apparatus for administering gaseous anesthetics, comprising a single integral body member provided with a transverse bore and arranged at one end of said bore for connection to a gas receptacle, said memher having a longitudinal passage communicating at one end with said bore and a transverse passage having its axis normal to the axis of said bore and open at both ends to the atmosphere and between its ends intersecting said bore, said body member at the other end of said longitudinal passage being arranged for the attachmentof a tube leading to a mantle or hood, said body member at its opposite end being arranged for connection to an anesthetic reservoir and having a passage leading therefrom to said gas receptacle, and a valve in said to control both the supply of anesthetic to said receptacle and the supply of air through said transverse passage to the longitudinal passage in said body member for transmission therethrough to the mantle or hood.

In testimony whereof, I have hereunto set my hand.

WESLEY LINFORD SMITH.

Witnesses:

WILLIAM B. WHARTON, 7M. P. LARKIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G.

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